Facebook used to design its servers and other hardware at labs scattered across the company, but they’ve now been consolidated in a state of the art facility at its Menlo Park, California, headquarters. The new lab is called Area 404, a play on the 404 error message seen on the web and, presumably, the U.S. military’s Area 51 research base. It covers 22,000 square feet and has 50 workbenches where engineers design, build and test their protptype hardware.